H264 HW encode using VideoToolbox

content/public/common/content_switches.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "build/build_config.h"
 #include "content/public/common/content_switches.h"
 
 namespace switches {
 
 // The number of MSAA samples for canvas2D. Requires MSAA support by GPU to
@@ skipping 970 matching lines @@
 // Linux speech service. Because it's buggy, the user must explicitly
 // enable it so that visiting a random webpage can't cause instability.
 const char kEnableSpeechDispatcher[] = "enable-speech-dispatcher";
 #endif
 
 #if defined(OS_MACOSX) && !defined(OS_IOS)
 // Disables support for Core Animation plugins. This is triggered when
 // accelerated compositing is disabled. See http://crbug.com/122430.
 const char kDisableCoreAnimationPlugins[] =
     "disable-core-animation-plugins";
+
+// Disables VideoToolbox API accelerated video encode.
+const char kDisableVTAcceleratedVideoEncode[] =
+    "disable-vt-accelerated-video-encode";
 #endif
 
 #if defined(OS_WIN)
 // /prefetch:# arguments to use when launching various process types. It has
 // been observed that when file reads are consistent for 3 process launches with
 // the same /prefetch:# argument, the Windows prefetcher starts issuing reads in
 // batch at process launch. Because reads depend on the process type, the
 // prefetcher wouldn't be able to observe consistent reads if no /prefetch:#
 // arguments were used. Note that the browser process has no /prefetch:#
 // argument; as such all other processes must have one in order to avoid
@@ skipping 44 matching lines @@
 const char kMemoryPressureThresholdsMb[] = "memory-pressure-thresholds-mb";
 
 // Enables the exporting of the tracing events to ETW. This is only supported on
 // Windows Vista and later.
 const char kTraceExportEventsToETW[] = "trace-export-events-to-etw";
 #endif
 
 // Don't dump stuff here, follow the same order as the header.
 
 }  // namespace switches